You know why your car has 21 miles on the odometer, right?
........I have a VERY good feeling that your car was used for an audit.
My car was used for an audit. A particular person took the Camaro on a SET course out on the highway....brake test, acceleration test, etc. The course and all driving from bay to bay, etc adds up to right at 21 miles. Again, I was at that same 21 miles. They just don't drive these bad boys around adding miles up on a SOLD Camaro! They take a select number and actually hold them for specific tests...DVT test (toe in, roll test, brake stamp), Care (exterior fit and finish), electric (interior electrical), and audit (road test, highway and city). The last part is where the miles are put on. If yours was held, you are one LUCKY person. Not only is it gone over by the folks on the line, but it's checked again by the people who KNOW their stuff.
I'd bet a grand it was audited.
Hope it was....